> For the complete documentation index, see [llms.txt](https://docs.nubrick.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nubrick.app/start/install/flutter.md).

# Flutter

## サポート環境 <a href="#requirements" id="requirements"></a>

### Android

* 実行時: Android minSdk 26 以上
* ビルド時: Android compileSdk 36 以上
* Android Gradle Plugin: 8.0 以上

### iOS

* iOS 15.0 以上
* Xcode 16.1 以上

***

## Step 1. パッケージをインストールする <a href="#step1" id="step1"></a>

<https://pub.dev/packages/nubrick_flutter> にパッケージが公開されています。

以下のコマンドを実行してパッケージをインストールしてください。

{% code title="Terminal" %}

```bash
flutter pub add nubrick_flutter
```

{% endcode %}

または、直接`pubspec.yaml`を編集し、`pub get`を実行することでもインストールできます。

{% code title="pubspec.yaml" %}

```yaml
dependencies:
  nubrick_flutter: <LATEST_VERSION>
```

{% endcode %}

{% code title="Terminal" %}

```bash
flutter pub get
```

{% endcode %}

***

## Step 2. Nubrick SDKを初期化する <a href="#step2" id="step2"></a>

{% code title="main.dart" %}

```dart
import 'package:nubrick_flutter/nubrick_flutter.dart';
import 'package:nubrick_flutter/provider.dart';
import 'package:nubrick_flutter/user.dart';

// ...

void main() {
  WidgetsFlutterBinding.ensureInitialized();

  // Initialize Nubrick Client
  Nubrick.initialize("<PROJECT_ID>");

  // Run your app
  runApp(const MyApp());
}

class _YourAppState extends State<YourApp> {
  @override
  void initState() {
    super.initState();

    // Set user's properties to use them in the nubrick experiment
    final user = NubrickUser();
    user.setProperties({
      'prefecture': "Tokyo",
      'environment': const bool.fromEnvironment('dart.vm.product')
          ? 'production'
          : 'development',
    });
  }

  @override
  Widget build(BuildContext context) {
    // Add NubrickProvider to your root widget
    return NubrickProvider(
      child: MaterialApp(
        // ...
      ),
    );
  }
}
```

{% endcode %}

## Step 3.a (Android only) Set up Platform Specific Code

To get it working on Android, you need to make a small change to your MainActivity.kt file.

{% code title="MainActivity.kt" %}

```kt
package com.example.app

import io.flutter.embedding.android.FlutterFragmentActivity

// 1. Extend FlutterFragmentActivity instead of FlutterActivity
class MainActivity: FlutterFragmentActivity()
```

{% endcode %}

and, set the runtime requirement (`minSdk` 26 or higher) and the build requirement (`compileSdk` 36 or higher) in your `android/app/build.gradle` or `android/app/build.gradle.kts` file.

{% tabs %}
{% tab title="Gradle (Groovy)" %}
`android/app/build.gradle` に以下を追加します。

```groovy
android {
    compileSdk 36

    defaultConfig {
        // Set the minimum sdk version to 26
        minSdkVersion 26
    }
}
```

{% endtab %}

{% tab title="Gradle (Kotlin DSL)" %}
`android/app/build.gradle.kts` に以下を追加します。

```kotlin
android {
    compileSdk = 36

    defaultConfig {
        // Set the minimum sdk version to 26
        minSdk = 26
    }
}
```

{% endtab %}
{% endtabs %}

finally, set the kotlin version to >= 1.9.10 in your `android/settings.gradle` or `android/settings.gradle.kts` file.

{% tabs %}
{% tab title="Gradle (Groovy)" %}
`android/settings.gradle` に以下を追加します。

```groovy
plugins {
    // ...
    id "org.jetbrains.kotlin.android" version "1.9.10" apply false
}
```

{% endtab %}

{% tab title="Gradle (Kotlin DSL)" %}
`android/settings.gradle.kts` に以下を追加します。

```kotlin
plugins {
    // ...
    id("org.jetbrains.kotlin.android") version "1.9.10" apply false
}
```

{% endtab %}
{% endtabs %}

## Step 3.b. (iOS only) Set up Platform Specific Code

To get it working on iOS, you need to change a minimum deployments to 15.0 in your ios/Runner.xcodeproj/project.pbxproj file.

1. In Xcode, navigate to `Runner.xcodeproj > TARGETS > Runner > General > Minimum Deployments`
2. Change the `minimum deployments` to `15.0`

Once you're finished, you can start using Nubrick.


---

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